They sort of did?

There have been a bunch of trials, and several countries changed their laws to prevent this exact form of money laundering.

The rich assholes then moved to different forms of money laundering.

Except the rich asshole who ordered the hit on Daphne Galizia, he's currently on trial for her murder, and for money laundering.

There was a movie about this, with Meryl Streep, and there was a real feel of outcry from it, and a real sense that they knew nothing would actually happen.

Campaign finance reform prevents serious reform from happening that could target the rich.